Downlink transmission method for TD-SCDMA base station for configuring distributed antenna unit

A technology of TD-SCDMA and distributed antennas, applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., can solve the problems of TD-SCDMA base stations lacking downlink transmission methods, achieve networking performance advantages, and reduce downlink Interference, the effect of improving the efficiency of use

Active Publication Date: 2009-03-18
ZTE CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current TD-SCDMA base station with distributed antenna units lacks a corresponding downlink transm

Method used

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  • Downlink transmission method for TD-SCDMA base station for configuring distributed antenna unit
  • Downlink transmission method for TD-SCDMA base station for configuring distributed antenna unit
  • Downlink transmission method for TD-SCDMA base station for configuring distributed antenna unit

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] figure 1 It has been described in the background technology, and will not be repeated here.

[0024] refer to figure 2 , the downlink transmitting method of 1 distributed antenna unit of the TD-SCDMA base station of disposing distributed antenna unit, comprises the following steps:

[0025] Step 201: The base station obtains information about the number of antennas contained in each distributed antenna unit configured, denoted as k i , i=1,2...D,k i is the number of antennas contained in the i-th distributed antenna unit, and D is the number of distributed antenna units configured by the base station;

[0026] Step 202: The base station separately calculates the path loss from the terminal to each distributed antenna unit, the path loss P of the i-th distributed antenna unit i =S-R i , i=1, 2...D, where S is the transmit power of the terminal's uplink tra...

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Abstract

The invention discloses a downlink transmission method of a TD-SCDMA base station of collocated distributed antenna units, wherein the method comprises the following steps: firstly, obtaining the antenna number information which is contained in each collocated distributed antenna unit by a base station, secondly, respectively calculating route loss from a terminal to each distributed antenna unit by the base station, thirdly, selecting an optimum distributed antenna unit of the terminal according to the downlink transmission weight of each distributed antenna unit by the base station, and fourthly, transmitting a downlink signal to the terminal on the optimum distributed antenna unit by the base station. The technical scheme which is provided by the invention can determine a downlink transmission signal of each distributed antenna unit which is allocated on the TD-SCDMA base station by the terminal, and thereby the TD-SCDMA base station of the collocation distributed antenna units focuses the downlink signal energy of the terminal on a distributed sub-domain which comprises the terminal, which not only improves the using efficiency of the downlink signal energy, but also reduces unnecessary downlink interference.

Description

technical field [0001] The present invention relates to a downlink transmission method of a TD-SCDMA base station, in particular to a downlink transmission method of a TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access) base station configured with distributed antenna units . Background technique [0002] At present, the number and form of antennas of TD-SCDMA base stations are developing toward diversification, and base stations equipped with various antenna numbers and forms are likely to be used in actual networking. Among them, a relatively new form of TD-SCDMA equipment is a base station equipped with multiple distributed antenna units. This base station is equipped with multiple distributed antenna units. A distributed antenna unit may be a single antenna or a multiple The smart antenna of the root antenna, the distance between each distributed unit is relatively long, and they jointly cover each ...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04B7/26H04B7/216
CPCY02D30/70
Inventor 马毅华
Owner ZTE CORP
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